Title:
DISTANCE MEASUREMENT CIRCUIT, RANGING DEVICE, AND MOVING BODY
Document Type and Number:
WIPO Patent Application WO/2020/195333
Kind Code:
A1
Abstract:
A distance measurement circuit (100) is provided with a first comparator (111A) for comparing the magnitude of a light reception signal outputted from a photodetector (77) and a first threshold value and outputting a first comparator output signal, a second comparator (111B) for comparing the magnitude of the light reception signal and a second threshold value larger than the first threshold value and outputting a second comparator output signal, a first TDC (112A) for measuring a first elapsed time from a reference pulse to the rising of the light reception signal on the basis of the first comparator output signal, a second TDC (112B) for measuring a second elapsed time from the reference pulse to the falling of the light reception signal on the basis of the second comparator output signal, and a processor (200) for determining the distance to a reflection point on the basis of the first and second elapsed times in accordance with a TOF formula.
Inventors:
OKAMOTO SHUJI (JP)
SAEKI TETSUO (JP)
ISHIMARU YUTAKA (JP)
EGAWA KAZUHO (JP)
EGAWA TOMOHIRO (JP)
SAEKI TETSUO (JP)
ISHIMARU YUTAKA (JP)
EGAWA KAZUHO (JP)
EGAWA TOMOHIRO (JP)
Application Number:
PCT/JP2020/006095
Publication Date:
October 01, 2020
Filing Date:
February 17, 2020
Export Citation:
Assignee:
NIDEC CORP (JP)
International Classes:
G01S7/487
Foreign References:
| US20180284275A1 | 2018-10-04 | |||
| US20120069322A1 | 2012-03-22 | |||
| JP2008180648A | 2008-08-07 |
Attorney, Agent or Firm:
OKUDA Seiji (JP)
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